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Internet Protocol Storage Area Networks (IP SAN). Module 3.4. IP Storage Area Networks. Upon completion of this module, you will be able to: Describe the benefits of IP SAN. Describe IP convergence in the SAN and its implications. Describe and discuss the basic architecture of FCIP iFCP

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ip storage area networks
IP Storage Area Networks

Upon completion of this module, you will be able to:

  • Describe the benefits of IP SAN.
  • Describe IP convergence in the SAN and its implications.
  • Describe and discuss the basic architecture of
    • FCIP
    • iFCP
    • iSCSI
  • Explain potential applications of IP SAN technology.

IP Storage Area Networks ( IP SAN)

in this module
In this module …

This module contains the following lessons:

  • IP SAN Overview.
  • IP SAN Protocols.
  • Applications of IP SAN.

IP Storage Area Networks ( IP SAN)

lesson ip san overview
Lesson: IP SAN Overview

Upon completion of this lesson, you will be able to:

  • Describe the benefits of IP SAN.
  • Describe the IP convergence in the SAN and its implications.
  • List the three common IP SAN approaches.
  • List the three deployment models (topologies) for IP SAN.

IP Storage Area Networks ( IP SAN)

introduction
Introduction
  • Traditional SAN technology is built around Fibre Channel.
  • IP technology is emerging as an alternative or supplemental transport for storage traffic.

Servers

Servers

Switch

Switch

Storage

Storage

= IP

= FC

Servers

Servers

IP Storage Area Networks ( IP SAN)

block storage over ip protocol options
IP

FC

IP

IP

IP

Block Storage over IP – Protocol options
  • iSCSI
    • SCSI over IP
      • IP encapsulation done on host / HBA(host bus adapter)
      • Hardware-based gateway to Fibre Channel storage
  • FCIP
    • Fibre Channel-to-IP bridge / tunnel (pointto point)
      • Fibre Channel end points
  • iFCP
    • IP as the inter-switch fabric
      • Fibre Channel end points

IP

FC

FC

IP

IP

FC/IP

IP/ FC

FC/IP

IP/

FC

IP Storage Area Networks ( IP SAN)

ip storage approaches
IP Storage Approaches

FCIP

iFCP

iSCSI

Servers

FC

FC

FCIP Router

iFCP Switch

IPNetwork

IPNetwork

IPNetwork

IPNetwork

FCIP Router

iFCPSwitch

iSCSI/FC Gateway

FC

FC

FC

Storage

IP Storage Area Networks ( IP SAN)

ip storage deployment models
= IP

= FC

= IP

= FC

= IP

= FC

= IP

= FC

IP Storage Deployment Models

Native

  • All Ethernet (No Fibre Channel)
  • iSCSI Protocol
  • Ethernet Switches & Routers

Bridging

  • Servers - Ethernet Attached
  • Storage - FC Attached (SAN or DAS)
  • iSCSI Protocol

Extension

  • Servers & Storage - SAN Attached
  • FCIP or iFCP Protocol
  • SRDF

IP Storage Area Networks ( IP SAN)

market drivers for san internetworking
Market Drivers for SAN Internetworking
  • Fibre Channel SAN challenges.
  • IP SAN enablers.
  • Easy to leverage IP equipment and expertise to help manage data in conjunction with Fibre Channel SANs.

IP Storage Area Networks ( IP SAN)

benefits of ip san
Benefits of IP SAN
  • Cost Effective
  • Extend the reach of a SAN

IP Storage Area Networks ( IP SAN)

ip is cost effective
IP is Cost Effective
  • Most organizations already have IP networks and familiarity with traditional network management.
  • Leverages existing Fibre Channel applications.

IP Storage Area Networks ( IP SAN)

extend the reach of your san
Extend the Reach of Your SAN
  • Standard Fibre Channel Distances.
  • IP Extends Fibre Channel applications over regional/global distances.
  • At higher link speeds, IP can handle synchronous applications.

IP Storage Area Networks ( IP SAN)

lesson summary
Lesson Summary

Topics in this lesson included:

  • Describe the benefits of IP SAN.
  • Describe the IP convergence in the SAN and its implications.
  • List the three common IP SAN approaches.
  • List the three deployment models (topologies) for IP SAN.

IP Storage Area Networks ( IP SAN)

lesson ip san protocols
Lesson: IP SAN Protocols

Upon completion of this lesson, you will be able to:

  • Describe and discuss the basic architecture of
    • FCIP
    • iFCP
    • iSCSI

IP Storage Area Networks ( IP SAN)

fibre channel over ip fcip
FCIP Encapsulation

FCIP Encapsulation

IP Payload

IP Payload

Fibre Channel over IP - FCIP
  • Encapsulates FC frames in IP packets.
  • Creates virtual FC links that connect devices and fabric elements.
  • Includes security, data integrity, congestion and performance specifications.

Fibre Channel Frame

FCHeader

SCSI Data

SCSI Data

SOF

CRC

EOF

IPHeader

TCPHeader

FCIPHeader

IP Datagram

IP Storage Area Networks ( IP SAN)

fcip benefits
Fibre Channel
  • Widely available
  • Low latency
  • High reliability
  • Off-the-shelf solutions
  • Mature standards

IP

  • Widely available
  • Accepted technology
  • Trained user base
  • Affordable
  • Mature standards
FCIP Benefits
  • FCIP
    • Best of both technologies
    • Support for existing applications
    • Cost effective
    • Multi-point networking

IP Storage Area Networks ( IP SAN)

internet fibre channel protocol ifcp
Fibre Channel Frame

FCHeader

SCSI Data

SCSI Data

SOF

CRC

EOF

iFCP Address Translation &Encapsulation

iFCP Address Translation &Encapsulation

IP Payload

IP Payload

Internet Fibre Channel Protocol - iFCP
  • Gateway-to-gateway protocol
    • IP switches & routers replace FC switches
    • Transparent to FC drivers
  • FC transport uses TCP connections
    • Point-to-multipoint networking possible

IPHeader

TCPHeader

iFCPHeader

IP Storage Area Networks ( IP SAN)

ifcp benefits
iFCP Benefits
  • Works with wide range of devices.
  • Flexible.
  • Less potential bottlenecking vs. FCIP.

IP Storage Area Networks ( IP SAN)

ifcp maps fcp to an ip fabric
iFCP Maps FCP to an IP Fabric

FC Loop Disks

FC Server

FC Tape Library

iFCP Gateway

iFCP Gateway

IP Network

iFCP Gateway

iFCP Gateway

FC Switch

Device-to-device session

IP Storage Area Networks ( IP SAN)

addressing and routing
Addressing and Routing
  • Local Mode.
  • Address Transparent Mode.
  • Routing between gateway regions is IP-only.

IP Storage Area Networks ( IP SAN)

slide21
iFCP

Servers

Servers

Gateway

Gateway

Switch

Switch

SAN A

SAN B

The two fabrics remain separate

Storage

Storage

IP Storage Area Networks ( IP SAN)

iscsi
iSCSI
  • A method to transfer blocks of data using the TCP/IP network.
  • Serialized service delivery subsystem.
  • SCSI protocol over IP.

IP Storage Area Networks ( IP SAN)

iscsi model layers
SCSI encapsulation

IP Payload

IP Payload

iSCSI Model Layers

Storage

SCSI Data

IPHeader

TCPHeader

iSCSIHeader

IP Datagram

IP Storage Area Networks ( IP SAN)

iscsi storage models
iSCSI Storage Models
  • Native
  • Bridging

Switch

Storage

Gateway

Servers

= IP

= FC

IP Storage Area Networks ( IP SAN)

controlling ip sans
Controlling IP SANS

A

iSNS

B

Target Z

Target Z - Device A – Initiator A

Target Z - Device B – Initiator B

Target Z - Device C – Initiator C

C

IP Network

Initiator A

Initiator C

Initiator B

IP Storage Area Networks ( IP SAN)

internet storage name server overview
Internet Storage Name Server Overview
  • iSNS is a client/server model.
  • The iSNS server is passive.
  • iSNS clients register & manipulate the objects in the iSNS server.
  • An iSNS server can be hosted on a target, initiator, or stand-alone server with a specified IP address.

IP Storage Area Networks ( IP SAN)

isns example
Security

Keys

iSNS Example

Management Platform

Storage

Device B

iSNS

Discovery

Domains

Host A

Device A

Storage

Host C

Host B

IP Storage Area Networks ( IP SAN)

iscsi nodes
iSCSI Nodes
  • A single Initiator or Target
  • Names are assigned to all Nodes
  • Independent of address

IP Storage Area Networks ( IP SAN)

architectural model
Network Portal10.1.1.1

Network Portal10.1.1.2

Network Portal10.1.2.2TCP port3260

Network Portal10.1.2.1TCP port3260

Architectural Model

iSCSI Node

Initiator

iSCSI Node

Target

IP Network

Network Entity

iSCSI Client

Network Entity

iSCSI Server

IP Storage Area Networks ( IP SAN)

fcip ifcp and iscsi comparison
FCIP, iFCP and iSCSI Comparison

IP Storage Area Networks ( IP SAN)

lesson summary1
Lesson Summary

Topics in this lesson included:

  • The basic architecture of FCIP.
  • The basic architecture of iFCP.
  • The basic architecture of iSCSI.

IP Storage Area Networks ( IP SAN)

lesson ip san applications
Lesson: IP SAN Applications

Upon completion of this lesson, you will be able to:

  • Describe common applications of IP SAN technology such as:
    • Remote Backup and Restore
    • Remote Data Replication
    • Storage Consolidation

IP Storage Area Networks ( IP SAN)

remote backup and restore
Remote Backup and Restore

Disks

Server

Servers

FC

FC

IP Network

Storage

FC

Disks

Server

Disks

IP Storage Area Networks ( IP SAN)

remote data replication
Remote Data Replication

Disks

Server

Servers

FC

FC

IP Network

Storage

FC

Disks

Disks

Server

IP Storage Area Networks ( IP SAN)

storage consolidation dual purpose ip network
IP NetworkStorage Consolidation/Dual Purpose IP Network

Servers

Disks

Servers

Switch

Switch

Servers

Disks

Disks

Switch

Switch

Disks

Disks

Disks

IP Storage Area Networks ( IP SAN)

lesson summary2
Lesson Summary

Topics in this lesson included:

  • Remote backup and restore
  • Remote data replication
  • Storage consolidation

IP Storage Area Networks ( IP SAN)

module summary
Module Summary

Topics in this module included: :

  • The benefits of IP SAN.
  • The IP convergence in the SAN and its implications
  • The basic architecture of FCIP
  • The basic architecture of iFCP
  • The basic architecture of iSCSI
  • Application of IP SAN technology

IP Storage Area Networks ( IP SAN)

check your knowledge
Check Your Knowledge
  • What are the benefits of IP SAN?
  • What are the three common protocols for IP SAN?
  • What data storage application could benefit from an IP SAN solution?

IP Storage Area Networks ( IP SAN)

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